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<TITLE>Switch -U - update files</TITLE>
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<P class="title">Switch <B>-U</B> - update files<hr></P>

<P>Can be used when creating or extracting an archive. Command string
"<A HREF="HELPCmdA.htm">a</A> -u" is the equivalent of command
<A HREF="HELPCmdU.htm">u</A>. Switch -u can also be used with command
<A HREF="HELPCmdM.htm">m</A>.</P>

<P>If switch -u is used with commands <A HREF="HELPCmdX.htm">x</A>
or <A HREF="HELPCmdE.htm">e</A>, then old files are replaced only
if newer versions extracted from the archive are more recent, but unlike
<A HREF="HELPSwF.htm">-f</A> if an archived file has no matching unpacked
file, it is still extracted.</P>

<P>Shell mode equivalent of this switch is "Add and update files" option
in <A HREF="HELPGetArcName.htm">Archive name and parameters dialog</A>
and "Extract and update files" option in <A HREF="HELPExtractOptions.htm">
Extraction path and options dialog</A>.</P>

<P>Supported only for RAR and ZIP formats.</P>

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